Finding the Fourth Proportional to 40,403.50, 55,636.49 and 39,507.37

Step by Step Solution

1. Step 1: Write the proportion equation
   40,403.50 : 55,636.49 = 39,507.37 : x
2. Step 2: Convert to fraction form
   40,403.50/55,636.49 = 39,507.37/x
3. Step 3: Cross multiply
   40,403.50x = 55,636.49 × 39,507.37
4. Step 4: Simplify right side
   40,403.50x = 2,198,051,355.61
5. Step 5: Solve for x
   x = 2,198,051,355.61/40,403.50
6. Step 6: Final answer
   x = 54,402.50